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- W3120365559 abstract "Estimations of the global carbon budget include a quantitative understanding of the evolving processes that occur along river-to-ocean gradients. However, high spatiotemporal resolution observations of these processes are limited. Here we present in situ measurements of the partial pressure of CO 2 ( pC O 2 ) made through the Amazon River plume (ARP) during different discharge seasons, from 2010 to 2012. We evaluated the spatiotemporal distribution of pC O 2 using Soil Moisture and Ocean Salinity (SMOS) satellite observations for each hydrologic period in the ARP. Regression models were used to estimate pC O 2 at the ARP for the period of 2010–2014. From these distributions we calculated sea-air gas exchange of CO 2 between the plume waters and the atmosphere ( F co 2 sea ). Intra-annual variability of F co 2 sea was related to discharge at the river mouth and ocean currents as well as trade winds in the plume. Climatic events during the study period had a significant impact on the F co 2 sea . Including the plume area closer to the river mouth makes the ARP a net source of CO 2 with an annual net sea-air flux of 8.6 ± 7.1 Tg C y −1 from 2011 to 2014. • Remote sensing was used to evaluate air-sea CO 2 exchange in the Amazon River plume. • Plume CO 2 fluxes varied by season and year, shifting between a net sink to source. • The plume was a net source of CO 2 to the atmosphere during rising water. • The inner Amazon River plume had high CO 2 fluxes compared to the outer plume. • The plume is a net source of CO 2 when the inner plume is included." @default.
- W3120365559 created "2021-01-18" @default.
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- W3120365559 date "2021-02-01" @default.
- W3120365559 modified "2023-10-13" @default.
- W3120365559 title "CO2 partial pressure and fluxes in the Amazon River plume using in situ and remote sensing data" @default.
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- W3120365559 doi "https://doi.org/10.1016/j.csr.2021.104348" @default.
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